Pileus Git - wmpus/blob - sys-x11.c

   1 /*
   2  * Copyright (c) 2011-2012, Andy Spencer <andy753421@gmail.com>
   3  *
   4  * Permission to use, copy, modify, and/or distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  14  */
  15
  16 #define _GNU_SOURCE
  17 #include <stdio.h>
  18 #include <stdlib.h>
  19 #include <search.h>
  20
  21 #include <X11/Xlib.h>
  22 #include <X11/Xproto.h>
  23 #include <X11/Xatom.h>
  24 #include <X11/keysym.h>
  25 #include <X11/extensions/Xinerama.h>
  26
  27 #include "util.h"
  28 #include "conf.h"
  29 #include "sys.h"
  30 #include "wm.h"
  31
  32 /* Configuration */
  33 static int border     = 2;
  34 static int no_capture = 0;
  35 static int stack      = 25;
  36
  37 /* Internal structures */
  38 struct win_sys {
  39         Window   xid;
  40         Display *dpy;
  41         struct {
  42                 int left, right, top, bottom;
  43         } strut;
  44 };
  45
  46 typedef struct {
  47         event_t ev;
  48         int     sym;
  49 } event_map_t;
  50
  51 typedef enum {
  52         WM_PROTO, WM_FOCUS, WM_DELETE,
  53         NET_STATE, NET_FULL, NET_STRUT,
  54         NET_TYPE, NET_DIALOG,
  55         NATOMS
  56 } atom_t;
  57
  58 typedef enum {
  59         CLR_FOCUS, CLR_UNFOCUS, CLR_URGENT, NCOLORS
  60 } color_t;
  61
  62 /* Global data */
  63 static win_t *root;
  64 static win_t *last;
  65 static int   running;
  66 static void *cache;
  67 static Atom atoms[NATOMS];
  68 static int (*xerrorxlib)(Display *, XErrorEvent *);
  69 static unsigned long colors[NCOLORS];
  70 static list_t *screens;
  71 static list_t *struts;
  72
  73 /* Debug functions */
  74 static char *state_map[] = {
  75         [ST_HIDE ] "hide ",
  76         [ST_SHOW ] "show ",
  77         [ST_FULL ] "full ",
  78         [ST_MAX  ] "max  ",
  79         [ST_SHADE] "shade",
  80         [ST_ICON ] "icon ",
  81         [ST_CLOSE] "close",
  82 };
  83
  84 /* Conversion functions */
  85 static event_map_t ev2sym[] = {
  86         {EV_LEFT    , XK_Left },
  87         {EV_RIGHT   , XK_Right},
  88         {EV_UP      , XK_Up   },
  89         {EV_DOWN    , XK_Down },
  90         {EV_HOME    , XK_Home },
  91         {EV_END     , XK_End  },
  92         {EV_PAGEUP  , XK_Prior},
  93         {EV_PAGEDOWN, XK_Next },
  94         {EV_F1      , XK_F1   },
  95         {EV_F2      , XK_F2   },
  96         {EV_F3      , XK_F3   },
  97         {EV_F4      , XK_F4   },
  98         {EV_F5      , XK_F5   },
  99         {EV_F6      , XK_F6   },
 100         {EV_F7      , XK_F7   },
 101         {EV_F8      , XK_F8   },
 102         {EV_F9      , XK_F9   },
 103         {EV_F10     , XK_F10  },
 104         {EV_F11     , XK_F11  },
 105         {EV_F12     , XK_F12  },
 106 };
 107
 108 /* - Modifiers */
 109 static mod_t x2mod(unsigned int state, int up)
 110 {
 111         return (mod_t){
 112                .alt   = !!(state & Mod1Mask   ),
 113                .ctrl  = !!(state & ControlMask),
 114                .shift = !!(state & ShiftMask  ),
 115                .win   = !!(state & Mod4Mask   ),
 116                .up    = up,
 117         };
 118 }
 119
 120 static unsigned int mod2x(mod_t mod)
 121 {
 122         return (mod.alt   ? Mod1Mask    : 0)
 123              | (mod.ctrl  ? ControlMask : 0)
 124              | (mod.shift ? ShiftMask   : 0)
 125              | (mod.win   ? Mod4Mask    : 0);
 126 }
 127
 128 /* - Keycodes */
 129 static event_t xk2ev(KeySym sym)
 130 {
 131         event_map_t *em = map_getr(ev2sym,sym);
 132         return em ? em->ev : sym;
 133 }
 134
 135 static KeySym ev2xk(event_t ev)
 136 {
 137         event_map_t *em = map_get(ev2sym,ev);
 138         return em ? em->sym : ev;
 139 }
 140
 141 static event_t xb2ev(int btn)
 142 {
 143         return btn + EV_MOUSE0;
 144 }
 145
 146 static int ev2xb(event_t ev)
 147 {
 148         return ev - EV_MOUSE0;
 149 }
 150
 151 /* - Pointers */
 152 static ptr_t x2ptr(XEvent *xe)
 153 {
 154         XKeyEvent *xke = &xe->xkey;
 155         return (ptr_t){xke->x, xke->y, xke->x_root, xke->y_root};
 156 }
 157
 158 static Window getfocus(win_t *root, XEvent *xe)
 159 {
 160         int revert;
 161         Window focus = PointerRoot;
 162         if (xe->type == KeyPress || xe->type == KeyRelease)
 163                 XGetInputFocus(root->sys->dpy, &focus, &revert);
 164         if (focus == PointerRoot)
 165                 focus = xe->xkey.subwindow;
 166         if (focus == None)
 167                 focus = xe->xkey.window;
 168         return focus;
 169 }
 170
 171 /* Strut functions
 172  *   Struts are spaces at the edges of the screen that are used by
 173  *   toolbars and statusbars such as dzen. */
 174 static int strut_copy(win_t *to, win_t *from, int scale)
 175 {
 176         int left   = from->sys->strut.left;
 177         int right  = from->sys->strut.right;
 178         int top    = from->sys->strut.top;
 179         int bottom = from->sys->strut.bottom;
 180         if (left == 0 && right == 0 && top == 0 && bottom == 0)
 181                 return 0;
 182         to->x += scale*(left      );
 183         to->y += scale*(top       );
 184         to->w -= scale*(left+right);
 185         to->h -= scale*(top+bottom);
 186         to->sys->strut.left   += scale*left;
 187         to->sys->strut.right  += scale*right;
 188         to->sys->strut.top    += scale*top;
 189         to->sys->strut.bottom += scale*bottom;
 190         return 1;
 191 }
 192
 193 static int strut_add(win_t *root, win_t *win)
 194 {
 195         /* Get X11 strut data */
 196         Atom ret_type;
 197         int ret_size;
 198         unsigned long ret_items, bytes_left;
 199         unsigned char *xdata;
 200         int status = XGetWindowProperty(win->sys->dpy, win->sys->xid,
 201                         atoms[NET_STRUT], 0L, 4L, False, XA_CARDINAL,
 202                         &ret_type, &ret_size, &ret_items, &bytes_left, &xdata);
 203         if (status != Success || ret_size != 32 || ret_items != 4)
 204                 return 0;
 205
 206         win->sys->strut.left   = ((long*)xdata)[0];
 207         win->sys->strut.right  = ((long*)xdata)[1];
 208         win->sys->strut.top    = ((long*)xdata)[2];
 209         win->sys->strut.bottom = ((long*)xdata)[3];
 210         struts = list_insert(struts, win);
 211         for (list_t *cur = screens; cur; cur = cur->next)
 212                 strut_copy(cur->data, win, 1);
 213         return strut_copy(root, win, 1);
 214 }
 215
 216 static int strut_del(win_t *root, win_t *win)
 217 {
 218         list_t *lwin = list_find(struts, win);
 219         if (lwin)
 220                 struts = list_remove(struts, lwin, 0);
 221         for (list_t *cur = screens; cur; cur = cur->next)
 222                 strut_copy(cur->data, win, -1);
 223         return strut_copy(root, win, -1);
 224 }
 225
 226 /* Window functions */
 227 static Atom win_prop(win_t *win, atom_t prop);
 228 static win_t *win_find(Display *dpy, Window xid, int create);
 229
 230 static win_t *win_new(Display *dpy, Window xid)
 231 {
 232         Window trans;
 233         XWindowAttributes attr;
 234         if (XGetWindowAttributes(dpy, xid, &attr))
 235                 if (attr.override_redirect)
 236                         return NULL;
 237
 238         win_t *win    = new0(win_t);
 239         win->x        = attr.x;
 240         win->y        = attr.y;
 241         win->w        = attr.width;
 242         win->h        = attr.height;
 243         win->sys      = new0(win_sys_t);
 244         win->sys->dpy = dpy;
 245         win->sys->xid = xid;
 246
 247         if (root) {
 248                 if (strut_add(root, win))
 249                         win->type = TYPE_TOOLBAR;
 250
 251                 if (win_prop(win, NET_TYPE) == atoms[NET_DIALOG])
 252                         win->type = TYPE_DIALOG;
 253
 254                 if (win_prop(win, NET_STATE) == atoms[NET_FULL])
 255                         win->state = ST_FULL;
 256
 257                 if (XGetTransientForHint(dpy, xid, &trans))
 258                         win->parent = win_find(dpy, trans, 0);
 259
 260                 XSelectInput(dpy, xid, PropertyChangeMask);
 261         }
 262
 263         printf("win_new: win=%p x11=(%p,%d) state=%x pos=(%d,%d %dx%d) type=%s\n",
 264                         win, dpy, (int)xid, win->state,
 265                         win->x, win->y, win->w, win->h,
 266                         win->type == TYPE_NORMAL  ? "normal"  :
 267                         win->type == TYPE_DIALOG  ? "dialog"  :
 268                         win->type == TYPE_TOOLBAR ? "toolbar" : "unknown");
 269
 270         if (root)
 271                 wm_insert(win);
 272
 273         return win;
 274 }
 275
 276 static int win_cmp(const void *_a, const void *_b)
 277 {
 278         const win_t *a = _a, *b = _b;
 279         if (a->sys->dpy < b->sys->dpy) return -1;
 280         if (a->sys->dpy > b->sys->dpy) return  1;
 281         if (a->sys->xid < b->sys->xid) return -1;
 282         if (a->sys->xid > b->sys->xid) return  1;
 283         return 0;
 284 }
 285
 286 static win_t *win_find(Display *dpy, Window xid, int create)
 287 {
 288         if (!dpy || !xid)
 289                 return NULL;
 290         //printf("win_find: %p, %d\n", dpy, (int)xid);
 291         win_sys_t sys = {.dpy=dpy, .xid=xid};
 292         win_t     tmp = {.sys=&sys};
 293         win_t **old = NULL, *new = NULL;
 294         if ((old = tfind(&tmp, &cache, win_cmp)))
 295                 return *old;
 296         if (create && (new = win_new(dpy,xid)))
 297                 tsearch(new, &cache, win_cmp);
 298         return new;
 299 }
 300
 301 static void win_free(win_t *win)
 302 {
 303         if (win == last)
 304                 last = NULL;
 305         free(win->sys);
 306         free(win);
 307 }
 308
 309 static void win_remove(win_t *win)
 310 {
 311         if (win != root) {
 312                 strut_del(root, win);
 313                 wm_remove(win);
 314         }
 315         tdelete(win, &cache, win_cmp);
 316         win_free(win);
 317 }
 318
 319 static int win_viewable(Display *dpy, Window xid)
 320 {
 321         XWindowAttributes attr;
 322         if (XGetWindowAttributes(dpy, xid, &attr))
 323                 return attr.map_state == IsViewable;
 324         else
 325                 return True;
 326 }
 327
 328 static int win_msg(win_t *win, atom_t msg)
 329 {
 330         int n, found = 0;
 331         Atom *protos;
 332         if (!XGetWMProtocols(win->sys->dpy, win->sys->xid, &protos, &n))
 333                 return 0;
 334
 335         while (!found && n--)
 336                 found = protos[n] == atoms[msg];
 337         XFree(protos);
 338         if (!found)
 339                 return 0;
 340
 341         XSendEvent(win->sys->dpy, win->sys->xid, False, NoEventMask, &(XEvent){
 342                 .xclient.type         = ClientMessage,
 343                 .xclient.window       = win->sys->xid,
 344                 .xclient.message_type = atoms[WM_PROTO],
 345                 .xclient.format       = 32,
 346                 .xclient.data.l[0]    = atoms[msg],
 347                 .xclient.data.l[1]    = CurrentTime,
 348         });
 349         return 1;
 350 }
 351
 352 static Atom win_prop(win_t *win, atom_t prop)
 353 {
 354         int format;
 355         unsigned long nitems, bytes;
 356         unsigned char *buf = NULL;
 357         Atom atom, type = XA_ATOM;
 358         if (XGetWindowProperty(win->sys->dpy, win->sys->xid, atoms[prop],
 359                         0L, sizeof(Atom), False, type, &type, &format, &nitems, &bytes, &buf) || !buf)
 360                 return 0;
 361         atom = *(Atom *)buf;
 362         XFree(buf);
 363         return atom;
 364 }
 365
 366 /* Drawing functions */
 367 static unsigned long get_color(Display *dpy, const char *name)
 368 {
 369         XColor color;
 370         int screen = DefaultScreen(dpy);
 371         Colormap cmap = DefaultColormap(dpy, screen);
 372         XAllocNamedColor(dpy, cmap, name, &color, &color);
 373         return color.pixel;
 374 }
 375
 376 /* Callbacks */
 377 static void process_event(int type, XEvent *xe, win_t *root)
 378 {
 379         Display  *dpy = root->sys->dpy;
 380         win_t *win = NULL;
 381         //printf("event: %d\n", type);
 382
 383         /* Common data for all these events ... */
 384         ptr_t ptr = {}; mod_t mod = {};
 385         if (type == KeyPress    || type == KeyRelease    ||
 386             type == ButtonPress || type == ButtonRelease ||
 387             type == MotionNotify) {
 388                 Window xid = getfocus(root, xe);
 389                 if (!(win = win_find(dpy,xid,0)))
 390                         return;
 391                 //printf("button-press %p\n", win);
 392                 ptr = x2ptr(xe);
 393                 mod = x2mod(xe->xkey.state, type==KeyRelease||type==ButtonRelease);
 394         }
 395
 396         /* Split based on event */
 397         if (type == KeyPress) {
 398                 while (XCheckTypedEvent(dpy, KeyPress, xe));
 399                 KeySym sym = XLookupKeysym(&xe->xkey, 0);
 400                 //printf("got xe %c %hhx\n", xk2ev(sym), mod2int(mod));
 401                 wm_handle_event(win, xk2ev(sym), mod, ptr);
 402         }
 403         else if (type == KeyRelease) {
 404                 //printf("release: %lx\n", xe->xkey.window);
 405         }
 406         else if (type == ButtonPress) {
 407                 if (wm_handle_event(win, xb2ev(xe->xbutton.button), mod, ptr)) {
 408                         //printf("grab pointer\n");
 409                         XGrabPointer(dpy, xe->xbutton.root, True, PointerMotionMask|ButtonReleaseMask,
 410                                         GrabModeAsync, GrabModeAsync, None, None, CurrentTime);
 411                 } else {
 412                         //printf("allow events\n");
 413                         XAllowEvents(win->sys->dpy, ReplayPointer, xe->xbutton.time);
 414                 }
 415         }
 416         else if (type == ButtonRelease) {
 417                 XUngrabPointer(dpy, CurrentTime);
 418                 wm_handle_event(win, xb2ev(xe->xbutton.button), mod, ptr);
 419         }
 420         else if (type == MotionNotify) {
 421                 while (XCheckTypedEvent(dpy, MotionNotify, xe));
 422                 wm_handle_ptr(win, ptr);
 423         }
 424         else if (type == EnterNotify || type == LeaveNotify) {
 425                 printf("%s: %lx\n", type==EnterNotify?"enter":"leave",
 426                                 xe->xcrossing.window);
 427                 event_t ev = type == EnterNotify ? EV_ENTER : EV_LEAVE;
 428                 if ((win = win_find(dpy,xe->xcrossing.window,0)))
 429                         wm_handle_event(win, ev, MOD(), PTR());
 430         }
 431         else if (type == FocusIn || type == FocusOut) {
 432                 //printf("focus: %lx\n", xe->xfocus.window);
 433                 event_t ev = type == FocusIn ? EV_FOCUS : EV_UNFOCUS;
 434                 if ((win = win_find(dpy,xe->xfocus.window,0)))
 435                         wm_handle_event(win, ev, MOD(), PTR());
 436         }
 437         else if (type == ConfigureNotify) {
 438                 //printf("configure: %lx\n", xe->xconfigure.window);
 439         }
 440         else if (type == MapNotify) {
 441                 printf("map: %lx\n", xe->xmap.window);
 442         }
 443         else if (type == UnmapNotify) {
 444                 if ((win = win_find(dpy,xe->xunmap.window,0)) &&
 445                      win->state != ST_HIDE) {
 446                         printf("unmap: %lx\n", xe->xunmap.window);
 447                         wm_handle_state(win, win->state, ST_HIDE);
 448                         win->state = ST_HIDE;
 449                 }
 450         }
 451         else if (type == DestroyNotify) {
 452                 printf("destroy: %lx\n", xe->xdestroywindow.window);
 453                 if ((win = win_find(dpy,xe->xdestroywindow.window,0)))
 454                         win_remove(win);
 455         }
 456         else if (type == ConfigureRequest) {
 457                 XConfigureRequestEvent *cre = &xe->xconfigurerequest;
 458                 printf("configure_req: %lx - (0x%lx) %dx%d @ %d,%d\n",
 459                                 cre->window, cre->value_mask,
 460                                 cre->height, cre->width, cre->x, cre->y);
 461                 if ((win = win_find(dpy,cre->window,1))) {
 462                         int border_width = (win->type == TYPE_TOOLBAR ? 0 : border);
 463                         XSendEvent(dpy, cre->window, False, StructureNotifyMask, &(XEvent){
 464                                 .xconfigure.type         = ConfigureNotify,
 465                                 .xconfigure.display      = win->sys->dpy,
 466                                 .xconfigure.event        = win->sys->xid,
 467                                 .xconfigure.window       = win->sys->xid,
 468                                 .xconfigure.x            = win->x,
 469                                 .xconfigure.y            = win->y,
 470                                 .xconfigure.width        = win->w,
 471                                 .xconfigure.height       = win->h,
 472                                 .xconfigure.border_width = border_width,
 473                         });
 474                         XSync(win->sys->dpy, False);
 475                 }
 476         }
 477         else if (type == MapRequest) {
 478                 printf("map_req: %lx\n", xe->xmaprequest.window);
 479                 win = win_find(dpy,xe->xmaprequest.window,1);
 480                 // fixme, for hide -> max, etc
 481                 if (win->state == ST_HIDE) {
 482                         wm_handle_state(win, win->state, ST_SHOW);
 483                         win->state = ST_SHOW;
 484                 }
 485                 sys_show(win, win->state);
 486         }
 487         else if (type == ClientMessage) {
 488                 XClientMessageEvent *cme = &xe->xclient;
 489                 printf("client_msg: %lx - %ld %ld,%ld,%ld,%ld,%ld\n",
 490                                 cme->window, cme->message_type,
 491                                 cme->data.l[0], cme->data.l[1], cme->data.l[2],
 492                                 cme->data.l[3], cme->data.l[4]);
 493                 if ((win = win_find(dpy,cme->window,0))     &&
 494                     (cme->message_type == atoms[NET_STATE]) &&
 495                     (cme->data.l[1] == atoms[NET_FULL] ||
 496                      cme->data.l[2] == atoms[NET_FULL])) {
 497                         state_t next = (cme->data.l[0] == 1 || /* _NET_WM_STATE_ADD    */
 498                                        (cme->data.l[0] == 2 && /* _NET_WM_STATE_TOGGLE */
 499                                         win->state != ST_FULL)) ? ST_FULL : ST_SHOW;
 500                         wm_handle_state(win, win->state, next);
 501                         sys_show(win, next);
 502                 }
 503         }
 504         else if (type == PropertyNotify) {
 505                 printf("prop: %lx - %d\n", xe->xproperty.window, xe->xproperty.state);
 506         }
 507         else {
 508                 printf("unknown event: %d\n", type);
 509         }
 510 }
 511
 512 static int xerror(Display *dpy, XErrorEvent *err)
 513 {
 514         if (err->error_code == BadWindow ||
 515             (err->request_code == X_SetInputFocus     && err->error_code == BadMatch   ) ||
 516             (err->request_code == X_PolyText8         && err->error_code == BadDrawable) ||
 517             (err->request_code == X_PolyFillRectangle && err->error_code == BadDrawable) ||
 518             (err->request_code == X_PolySegment       && err->error_code == BadDrawable) ||
 519             (err->request_code == X_ConfigureWindow   && err->error_code == BadMatch   ) ||
 520             (err->request_code == X_GrabButton        && err->error_code == BadAccess  ) ||
 521             (err->request_code == X_GrabKey           && err->error_code == BadAccess  ) ||
 522             (err->request_code == X_CopyArea          && err->error_code == BadDrawable))
 523                 return 0;
 524         if (err->request_code == X_ChangeWindowAttributes && err->error_code == BadAccess)
 525                 error("Another window manager is already running");
 526         return xerrorxlib(dpy, err);
 527 }
 528
 529 static int xnoerror(Display *dpy, XErrorEvent *err)
 530 {
 531         return 0;
 532 }
 533
 534
 535 /********************
 536  * System functions *
 537  ********************/
 538 void sys_move(win_t *win, int x, int y, int w, int h)
 539 {
 540         //printf("sys_move: %p - %d,%d  %dx%d\n", win, x, y, w, h);
 541         int b = 2*border;
 542         win->x = x; win->y = y;
 543         win->w = MAX(w,1+b); win->h = MAX(h,1+b);
 544         w      = MAX(w-b,1); h      = MAX(h-b,1);
 545         XConfigureWindow(win->sys->dpy, win->sys->xid, CWX|CWY|CWWidth|CWHeight,
 546                 &(XWindowChanges) { .x=x, .y=y, .width=w, .height=h });
 547         XMoveResizeWindow(win->sys->dpy, win->sys->xid, x, y, w, h);
 548
 549         /* Flush events, so moving window doesn't cause re-focus
 550          * There's probably a better way to do this */
 551         XEvent xe;
 552         XSync(win->sys->dpy, False);
 553         while (XCheckMaskEvent(win->sys->dpy, EnterWindowMask|LeaveWindowMask, &xe))
 554                 printf("Skipping enter/leave event\n");
 555 }
 556
 557 void sys_raise(win_t *win)
 558 {
 559         //printf("sys_raise: %p\n", win);
 560         XRaiseWindow(win->sys->dpy, win->sys->xid);
 561         for (list_t *cur = struts; cur; cur = cur->next)
 562                 XRaiseWindow(((win_t*)cur->data)->sys->dpy,
 563                              ((win_t*)cur->data)->sys->xid);
 564 }
 565
 566 void sys_focus(win_t *win)
 567 {
 568         //printf("sys_focus: %p\n", win);
 569
 570         /* Set actual focus */
 571         XSetInputFocus(win->sys->dpy, win->sys->xid,
 572                         RevertToPointerRoot, CurrentTime);
 573         //win_msg(win, WM_FOCUS);
 574
 575         /* Set border on focused window */
 576         if (last)
 577                 XSetWindowBorder(last->sys->dpy, last->sys->xid, colors[CLR_UNFOCUS]);
 578         XSync(win->sys->dpy, False);
 579         XSetWindowBorder(win->sys->dpy, win->sys->xid, colors[CLR_FOCUS]);
 580         last = win;
 581 }
 582
 583 void sys_show(win_t *win, state_t state)
 584 {
 585         //if (win->state == state)
 586         //      return;
 587
 588         /* Debug */
 589         printf("sys_show: %p: %s -> %s\n", win,
 590                         state_map[win->state], state_map[state]);
 591
 592         /* Find screen */
 593         win_t *screen = NULL;
 594         if (state == ST_FULL || state == ST_MAX) {
 595                 for (list_t *cur = screens; cur; cur = cur->next) {
 596                         screen = cur->data;
 597                         if (win->x >= screen->x && win->x <= screen->x+screen->w &&
 598                             win->y >= screen->y && win->y <= screen->y+screen->h)
 599                                 break;
 600                 }
 601         }
 602
 603         /* Update properties */
 604         if (state == ST_FULL)
 605                 XChangeProperty(win->sys->dpy, win->sys->xid, atoms[NET_STATE], XA_ATOM, 32,
 606                                 PropModeReplace, (unsigned char*)&atoms[NET_FULL], 1);
 607         else if (state != ST_FULL)
 608                 XChangeProperty(win->sys->dpy, win->sys->xid, atoms[NET_STATE], XA_ATOM, 32,
 609                                 PropModeReplace, (unsigned char*)0, 0);
 610
 611         /* Update border */
 612         if (win->type == TYPE_TOOLBAR || state == ST_FULL)
 613                 XSetWindowBorderWidth(win->sys->dpy, win->sys->xid, 0);
 614         else if (state == ST_SHOW || state == ST_MAX || state == ST_SHADE)
 615                 XSetWindowBorderWidth(win->sys->dpy, win->sys->xid, border);
 616
 617         /* Map/Unmap window */
 618         if (state == ST_SHOW || state == ST_FULL || state == ST_MAX || state == ST_SHADE)
 619                 XMapWindow(win->sys->dpy, win->sys->xid);
 620         else if (state == ST_HIDE)
 621                 XUnmapWindow(win->sys->dpy, win->sys->xid);
 622
 623         /* Resize windows */
 624         if (state == ST_SHOW) {
 625                 sys_move(win, win->x, win->y, win->w, win->h);
 626         } else if (state == ST_MAX) {
 627                 sys_move(win, screen->x, screen->y, screen->w, screen->h);
 628         } else if (state == ST_FULL) {
 629                 XWindowChanges wc = {
 630                         .x      = screen->x - screen->sys->strut.left ,
 631                         .y      = screen->y - screen->sys->strut.top ,
 632                         .width  = screen->w + screen->sys->strut.left + screen->sys->strut.right,
 633                         .height = screen->h + screen->sys->strut.top  + screen->sys->strut.bottom
 634                 };
 635                 win->x = wc.x;     win->y = wc.y;
 636                 win->w = wc.width; win->h = wc.height;
 637                 XConfigureWindow(win->sys->dpy, win->sys->xid, CWX|CWY|CWWidth|CWHeight, &wc);
 638                 XMoveResizeWindow(win->sys->dpy, win->sys->xid, wc.x, wc.y, wc.width, wc.height);
 639         } else if (state == ST_SHADE) {
 640                 XConfigureWindow(win->sys->dpy, win->sys->xid, CWHeight,
 641                         &(XWindowChanges) { .height = stack });
 642         }
 643
 644         /* Raise window */
 645         if (state == ST_FULL || state == ST_MAX)
 646                 XRaiseWindow(win->sys->dpy, win->sys->xid);
 647
 648         /* Close windows */
 649         if (state == ST_CLOSE) {
 650                 if (!win_msg(win, WM_DELETE)) {
 651                         XGrabServer(win->sys->dpy);
 652                         XSetErrorHandler(xnoerror);
 653                         XSetCloseDownMode(win->sys->dpy, DestroyAll);
 654                         XKillClient(win->sys->dpy, win->sys->xid);
 655                         XSync(win->sys->dpy, False);
 656                         XSetErrorHandler(xerror);
 657                         XUngrabServer(win->sys->dpy);
 658                 }
 659         }
 660
 661         /* Update state */
 662         win->state = state;
 663 }
 664
 665 void sys_watch(win_t *win, event_t ev, mod_t mod)
 666 {
 667         //printf("sys_watch: %p - %x %hhx\n", win, ev, mod);
 668         XWindowAttributes attr;
 669         XGetWindowAttributes(win->sys->dpy, win->sys->xid, &attr);
 670         long mask = attr.your_event_mask;
 671         if (EV_MOUSE0 <= ev && ev <= EV_MOUSE7)
 672                 XGrabButton(win->sys->dpy, ev2xb(ev), mod2x(mod), win->sys->xid, False,
 673                                 mod.up ? ButtonReleaseMask : ButtonPressMask,
 674                                 GrabModeSync, GrabModeAsync, None, None);
 675         else if (ev == EV_ENTER)
 676                 XSelectInput(win->sys->dpy, win->sys->xid, EnterWindowMask|mask);
 677         else if (ev == EV_LEAVE)
 678                 XSelectInput(win->sys->dpy, win->sys->xid, LeaveWindowMask|mask);
 679         else if (ev == EV_FOCUS || ev == EV_UNFOCUS)
 680                 XSelectInput(win->sys->dpy, win->sys->xid, FocusChangeMask|mask);
 681         else
 682                 XGrabKey(win->sys->dpy, XKeysymToKeycode(win->sys->dpy, ev2xk(ev)),
 683                                 mod2x(mod), win->sys->xid, True, GrabModeAsync, GrabModeAsync);
 684 }
 685
 686 void sys_unwatch(win_t *win, event_t ev, mod_t mod)
 687 {
 688         if (EV_MOUSE0 <= ev && ev <= EV_MOUSE7)
 689                 XUngrabButton(win->sys->dpy, ev2xb(ev), mod2x(mod), win->sys->xid);
 690 }
 691
 692 list_t *sys_info(win_t *win)
 693 {
 694         /* Use global copy of screens so we can add struts */
 695         if (screens == NULL) {
 696                 /* Add Xinerama screens */
 697                 int n = 0;
 698                 XineramaScreenInfo *info = NULL;
 699                 if (XineramaIsActive(win->sys->dpy))
 700                         info = XineramaQueryScreens(win->sys->dpy, &n);
 701                 for (int i = 0; i < n; i++) {
 702                         win_t *screen = new0(win_t);
 703                         screen->x = info[i].x_org;
 704                         screen->y = info[i].y_org;
 705                         screen->w = info[i].width;
 706                         screen->h = info[i].height;
 707                         screen->sys = new0(win_sys_t);
 708                         screens = list_append(screens, screen);
 709                 }
 710         }
 711         if (screens == NULL) {
 712                 /* No xinerama support */
 713                 win_t *screen = new0(win_t);
 714                 *screen = *win;
 715                 screens = list_insert(NULL, screen);
 716         }
 717         return screens;
 718 }
 719
 720 win_t *sys_init(void)
 721 {
 722         Display *dpy;
 723         Window   xid;
 724
 725         /* Load configuration */
 726         stack      = conf_get_int("main.stack",      stack);
 727         border     = conf_get_int("main.border",     border);
 728         no_capture = conf_get_int("main.no-capture", no_capture);
 729
 730         /* Open the display */
 731         if (!(dpy = XOpenDisplay(NULL)))
 732                 error("Unable to get display");
 733         if (!(xid = DefaultRootWindow(dpy)))
 734                 error("Unable to get root window");
 735
 736         /* Setup X11 data */
 737         atoms[WM_PROTO]    = XInternAtom(dpy, "WM_PROTOCOLS",               False);
 738         atoms[WM_FOCUS]    = XInternAtom(dpy, "WM_TAKE_FOCUS",              False);
 739         atoms[WM_DELETE]   = XInternAtom(dpy, "WM_DELETE_WINDOW",           False);
 740         atoms[NET_STATE]   = XInternAtom(dpy, "_NET_WM_STATE",              False);
 741         atoms[NET_FULL]    = XInternAtom(dpy, "_NET_WM_STATE_FULLSCREEN",   False);
 742         atoms[NET_STRUT]   = XInternAtom(dpy, "_NET_WM_STRUT",              False);
 743         atoms[NET_TYPE]    = XInternAtom(dpy, "_NET_WM_WINDOW_TYPE",        False);
 744         atoms[NET_DIALOG]  = XInternAtom(dpy, "_NET_WM_WINDOW_TYPE_DIALOG", False);
 745
 746         colors[CLR_FOCUS]   = get_color(dpy, "#a0a0ff");
 747         colors[CLR_UNFOCUS] = get_color(dpy, "#101066");
 748         colors[CLR_URGENT]  = get_color(dpy, "#ff0000");
 749         //printf("colors = #%06lx #%06lx #%06lx\n", colors[0], colors[1], colors[2]);
 750
 751         /* Select window management events */
 752         XSelectInput(dpy, xid, SubstructureRedirectMask|SubstructureNotifyMask);
 753         xerrorxlib = XSetErrorHandler(xerror);
 754
 755         return root = win_find(dpy, xid, 1);
 756 }
 757
 758 void sys_run(win_t *root)
 759 {
 760         /* Add each initial window */
 761         if (!no_capture) {
 762                 unsigned int nkids;
 763                 Window par, xid, *kids = NULL;
 764                 if (XQueryTree(root->sys->dpy, root->sys->xid,
 765                                         &par, &xid, &kids, &nkids)) {
 766                         for(int i = 0; i < nkids; i++)
 767                                 if (win_viewable(root->sys->dpy, kids[i]))
 768                                         win_find(root->sys->dpy, kids[i], 1);
 769                         XFree(kids);
 770                 }
 771         }
 772
 773         /* Main loop */
 774         running = 1;
 775         while (running)
 776         {
 777                 XEvent xe;
 778                 XNextEvent(root->sys->dpy, &xe);
 779                 process_event(xe.type, &xe, root);
 780         }
 781 }
 782
 783 void sys_exit(void)
 784 {
 785         running = 0;
 786 }
 787
 788 void sys_free(win_t *root)
 789 {
 790         XCloseDisplay(root->sys->dpy);
 791         while (screens) {
 792                 win_free(screens->data);
 793                 screens = list_remove(screens, screens, 0);
 794         }
 795         tdestroy(cache, (void(*)(void*))win_free);
 796 }